Writing pen



FIG. 1 is a side elevation view of the writing pen of the present invention with a protective cap at one end removed;

FIG. 2 is a front elevation view of the writing pen of the present invention with a protective cap at one end in place;

FIG. 3 is a side elevation view of the writing pen of the present invention with a protective cap at one end in place;

FIG. 4 is a rear elevation view of the writing pen of the present invention with a protective cap at one end in place;

FIG. 5 is another side elevation view of the writing pen of the present invention with a protective cap at one end in place;

FIG. 6 is a top plan view of the writing pen of the present invention with a protective cap at one end in place; and,

FIG. 7 is bottom plan view of the writing pen of the present invention with a protective cap at one end in place. 

The ornamental design for a writing pen, as shown and described. 